rekindle · worsen · escalate · inflame · smolder · simmer · boil over · outbreak · resurgence · comeback · return · rage · intensify · spike · blaze · temper · wound · fever
IDEA.org / Words / flare up again
Related — recur (Happen more than once); resurge (Rise anew); reignite (Cause to burn anew); erupt · relapse · rekindle · worsen · escalate · inflame · smolder · simmer · boil over · outbreak
intensity/activityflare up again ≠ die down Gradually become weaker; subside · abate · calm down · diminish · settle down
stabilityflare up again ≠ hold steady Remain constant, unmoved; stay calm · plateau · level off
visibility/emergenceflare up again ≠ disappear Pass from visibility; recede · fade away · go underground · hide · retreat
Word data: Linguabase (CC0) · www.idea.org/words/flare_up_again